A sledhead is crazed, out of their mind snowmobiler who loves powder, and breaking trail through five feet of snow. sledheads can be found all over, most prominant in the snowy regions of the west.
Sheghead is another word for 'Nitty' or 'Crackhead', Sheg itself means taking the piss within the united kingdom where it originated from. The first person who said this word was a man on discord by the name of Oneil Brooks